NEW YORK (CNNMoney) -- Just four years after the worst shock to the economy since the Great Depression, U.S. corporate profits are stronger than ever.

In the third quarter, corporate earnings were $1.75 trillion, up 18.6% from a year ago, according to last week'si gross domestic product report. That took after-tax profits to their greatest percentage of GDP in history.

But the record profits come at the same time that workers' wages have fallen to their lowest-ever share of GDP...

A separate government reading shows that total wages have now fallen to a record low of 43.5% of GDP. Until 1975, wages almost always accounted for at least half of GDP, and had been as high as 49% as recently as early 2001. ...